Drive for roll crusher



Dec. 1, 1964 w. w. DEPPE 3,159,356

DRIVE FOR ROLL CRUSHER Filed Jan. 25, 1962 2 Sheets-Sheet 2 gay. 5.

INV FJV TOR.

W/L BUR W. DEPPE flndrus Sfarlge ATTORNEYS United States Patent 3,159,356 DRWE FGR RGLL CRUSHER Wilbur W. Deppe, 515 4th Ave, Baraboo, Wis. Filed Jan. 25, 1962, Ser. No. 158,709 8 Claims. (Cl. 241-439) This invention relates to a roll crusher and more particularly to a drive system for a roll crusher.

In recent years there has been increased use of finer sized aggregate for covering gravel, rock surfacing and maintenance material. In addition bituminous mat and seal cove-rings require small sizes of fractured stones or aggregate made from oversize rock or gravel. The reduction of 6 or 8 inch stones to a size smaller than of an inch cannot be done economically in a single crushing operation. Therefore, secondary crushing is of primary importance and roll crushers are generally used in secondary crushing for the production of finer sizes of aggregate.

Roll crushers, in which the aggregate or other material to be crushed is fed between a pair of rotating rolls, are generally driven either by a star gear drive or a chain drive. In the conventional chain drive, a single endless chain is engaged with the drive sprocket and drives both roll shafts. Because of the substantial load on the roll shafts, the roll shafts and bearings have to be made of substantial size, and even with large roll shafts and bearings, the fracture of shafts and burnout of bearings under overload conditions frequently occurs.

The present invention is directed to a drive for a roll crusher in which the power is split at the pinion shaft and separate chain drives are employed for each roll. The split or reduction of power on each roll shaft thereby reduces the size of the bearings which are required. As less power is applied to each roll, the roll speed can be increased without the danger of breakdown.

The separate chain drive to each roll shaft also provides easier service and maintenance and makes the rolls more accessible for overlay welding which must be periodically employed to maintain the crushing surface of the rolls.

Other objects and advantages will appear in the course of the following description.

The drawings illustrate the best mode presently contemplated of carrying out the invention.

In the drawings:

FIG. 1 is a side elevation of a typical roll crusher employing the roll drive system of the invention;

FIG. 2 is a fragmentary plan view showing the rolls and roll drive mechanism;

FIG. 3 is an enlarged fragmentary side elevation with parts broken away in section showing the details of the gear; box and sprocket drive;

FIG. 4 is a fragmentary end view showing a roll and rive mechanism with parts broken away in section; and

FIG. 5 is an enlarged sectional view showing the details of the gear box and sprocket.

The drawings illustrate a portable roll crusher which includes a frame 1 which is mounted on a tandem wheel assembly indicated generally by 2. The forward portion of the frame 1 supports a tongue 3 which carries a kingpin 4 adapted to be connected to the fifth wheel of a tractor.

The aggregate or other material to be crushed is introduced into a bin 5 which is mounted on a pair of longitudinal channels 6 by a series of resilient supports 7. The channels 6 are spaced apart a greater distance than the side member of the frame 1 and are supported on a pair of cross members 8 which extend outward-1y from each side of the frame 1.

'The bin 5 includes a pair of vibrating screens 9 and 10 and the aggregate is deposited on the uppermost of the two 3,159,355 Patented Dec. 1, 1964 screens. The upper screen 9 has a larger mesh size than the lower screen 10 and a portion of the aggregate falls downwardly through the upper screen 9 onto the lower screen. The finer particles pass through the lower screen 10 onto the solid bottom 11 of the bin 5. The smaller aggregate moves forwardly along the bottom 11 to a hopper outlet 12 and is discharged onto a laterally extending conveyor 13 which conveys the aggregate to a truck or lo cation of use.

The entire bin 5, including the screens 9 and 1t and the bottom 11, is oscillated to move the aggregate along the screens and bottom by a series of oscillating units 14 which connect the side walls of the bin 5 with the channels 6. The oscillating units 14 are driven by a bell drive 15 which connects one of the units 14 with a suitable drive mechanism located in the drive housing 16 supported on the upper portion of bin 5.

The aggregate supported on the screens 9 and 10 is conveyed forwardly along the screens by the vibration or oscillation of the unit 14 and the aggregate then passes through an outlet spout 17 into a hopper 18 which feeds the aggregate between the crusher rolls 19 and 20.

The crushed aggregate passing between the rolls 19 and 2th is deflected by a plate 21 onto the upper surface of an endless belt conveyor 22 which is mounted on rollers 23 and 24 connected to the frame 1. The crushed aggregate is moved upwardly on the conveyor 22 to the rear end of the frame 1 where it is elevated by a drum conveyor 25 and redeposited into the bin 5. The drum conveyor 25 is supported for rotation by two pairs of rollers 26 which are monuted on the cross members 8.

. The rollers 26 ride on the flanges 27 of the drum conveyor 25 and support the drum in rotary motion.

The inner surface of the drum conveyor 25 is provided with a series of buckets or vanes 28 and the aggregate is discharged from the conveyor 22 into the buckets 28 at the lower portion of the drum. As the drum rotates, the aggregate is moved upwardly and is discharged into the hopper 5 which is located within the center of the rotating drum. The drum conveyor 25 is rotated about its axis by a drive mechanism, not shown.

The structure of the screens, oscillating units, belt conveyors and drum conveyors is of conventional design and forms no part of the present invention.

The crusher rolls 19 and 2d are secured to roller shafts 2? and 30, respectively, and the ends of the shafts are journaled within bearing blocks 31 and 32. The bearing blocks 31 and 32 are mounted between a lower support bar 33, secured to the side walls of the frame 1, and an upper support bar 34. The support bars 33 and 34 are connected together by a cross channel 35 located forwardly of the crusher rolls.

One of the crusher rolls 19 is fixed with respect to the frame and the other roll 20 is movable in a longitudinal direction toward and away from the roll 19 in order to vary the distance between the crusher rolls. The fixed roll 19 is prevented from moving to the rear by a stop 36 which is secured between the support bars 33 and 34. Horizontal plates 37 are secured to the support bars 33 and 34 and bear against the forward surface of the bearing block 31 and thereby prevent forward movement of the roll 19. A vertical plate 38 connects the plates 37 and a shim stop 39 is secured to the plate 38 and t0 the lower of the plates 37. A series of removable shims 40 are disposed between the shim stop 39 and the forward bearing block 32. By changing the number of size of the shims 46 the distance between the bearing blocks 31 and 32 can be varied and correspondingly the distance between the periphery of the crusher rolls 19 and 20 can also'be varied.

The movable crusher roll 20 is biased rearwardly by a coil spring 41 which is interposed between the bearing I The double sprockets 47 'tooth,,corrugated herringbone, or one roll can have a smooth ground surface and the other roll can have a slotted or saw tooth surface.

The roll shafts 29 and 30 each carry a pair of sprockets 44 and 45, respectively and the sprockets 44 and 45 are connected to double sprockets 46 and 47, respectively, by chains 48 and 49. A pair of adjustable tightener sprockets t) and 51 are associated with each pair of .chains 48 and 49 and by adjustment of the sprockets 5t and 51 proper tension can be maintained on the chains.

The double sprockets 46 and 47 are driven by a gear drive located within a gear box 52 mounted onsupport 53. A pluralityof triangular webs 54 connect the support 53 with the upper support bar 34 and provide reinfo'rcement for the support 53.

In addition to the support provided by member 53, the gear box 52 is also supported by anfL-shaped member 55v which is connected betweenthe opposite upper support 34'and therear wall 56 of the gear box. With this construction, the gear box which isloca'ted above one v7"1'are'driver1 by a pinion 34 which is carried on a V pinion shaft 85. The shaft 85 is journaled within bearing assemblies similar to 71 and 72- which are located within the front and rear walls of the gear box 52.

The outer end of the pinion shaft 85 is keyed to a flywheel S6 and to provide additional support for the pinion shaft, a bearing assembly, 87 journals the central portion of the pinion shaft 85 and is supported by a bracket 88 which is connected to the gear box 52.

Thefiywheel 36 is connected to the drive shaft 89 by a motor by a series of V-belts 91. The motor 99 is driven by a' suitable generating unit i2 mounted on the tongues.

I With the construction, rotation of the motor drive shaft 89 is transmitted through belts 91 to the fiywheel 86 which drives the pinion shaft 85. Shaft 85 drives the pinion 84 to thereby rotate the gears 77 and 78 which drive the roll crushers through the chain drives 48 and 49.

The use of the two chain drives which are taken off the pinion shaft 85 results in the load or power being split so that the roll shafts 29 and 3d are only subjected to one-half of the normal power or load to which arsingle chain drive would be subjected. This substantially reof the support members 34 is actually supported by. I

both of the support members 34. n 7

The gear box 52 is also provided with a removable front 'wall or cover 57 and the tightener sprockets 59 and 51 are mounted forrotation 'on the front wall 57. I

As best shown in FIG. 5, the sprockets 46 are secured to the outer surface of an' annular collar 58 which is secured to the flange 59 of a shaft 60 by bolts 61.

The collar 58 is mounted for rotation on an annular of a hub 63. The bearing assembly 62 is maintained on the hub by a nut 64 which is threaded on the outer. end of the hub. To prevent foreignrnatter from coning assembly 71 is mounted within a recess in the flange 66 of hub 63 while the bearing assembly 72 is mounted within a recess in a keeper plate 73 which is attached a Y to the outer surface of the rear wall 56 by bolts 74. The

keeper plate 73 is provided with an opening in alignment with the hollowinterior of the shaft 7t} which is normal- 2 iy closed off by plug 75.

duces the force applied to the roller shaft bearings and enables smaller roller shaft hearings to be employed. The split of the power by virtue of the two-chain drive,

also results in a lesser load on the chains and sprockets.

The gear drive from the pinion 84 to the gears 77 and 78 are located'in the gear box 52. This provides a unit which is easy to assemble and service. Normally, the gear box is partially filled with oil so that the gears are running through and picking up the oil or lubricant. in

addition, as the flywheel and gearbox are located on one side of the machine, the counter shaft which is normally employed with a conventional crusher, is eliminated. The elimination of the counter shaft provides greater accessibility to' the rollers and drive for maintenance and bearing assembly 62 which is carried on the outer surface 7 tation bya pair of bearing assemblies 71 and 72. Bear'- With this construction, any force applied to the sprockets" '7 46, which drive the roll crushers, will be transmitted through the bearing assembly 62 to the hub 63 rather than being transmitted directlyfto the gear shaft '70. As 'the load on the sprockets 46 is thereby, applied to the. gear box 52 rather than.to the gear shaft 70, the

bearings 71 and 72, which journal thegears'haft, can

be of smaller size. 1 V 1 arec'onne'cted in a similar manner to a gear shaft 76 and shafts and. 76- carry gears 77 and 78 respectively. The gears 77 and 78 are; made up of an inner section 79 welded to the outer surfaceof the gear shaft and an outer section 80 which is, provided with teeth and is connected to the inner sectionby rivets ,81.

I Gear 78 is engagedwith 83 are journaled'in bearing assemblies similar to bearing assemblies 71' and 72.. The-idler. gear 82 'andithe gear idler gear S2and which is' 1 secured to ajgear-shaft '83. The ends of the gear shaft 9 l and means for driving said flywheel-to thereby drive able with respect to the fixedroll and 'havingfai-shaft' size bearings to be used for the gear drive. Various modes of carrying out the invention are con- Y templated as being within the scope of the following claims particularly pointing out and distinctly claiming the subject matter which is regarded as the invention.

I claim: v a H 1. Ina roll crusher, a'frame having a pair of side members, a fixed roll having a shaft journaled within said side members, a movable roll movable with respect to the fixed 'roll and having a shaft journaled within said side members, a gear box mounted on one of saidside members, a first gear having a gear'shaft extending outwardly of said gear box and connected to the fixed roll shaft, a second gear disposed in said gear box and having a gear shaft extending outwardly of the gear box and connected ,to the movable-roll shaft, a drive gear mounted in the gearbox and operably. connected to said firstand second gears, a drive shaft connected to the drive gear andextending outwardly from the gear box in the same direction as said gear shaft, aflywheel connected to said drive shaft,

drive shaft and rotate said crusher rolls.

' 2.;Ina roll crusher, a frame having a pair of spaced side members, a fixed rollhaving ashaft journaled for iii rotation within said side members, a movabl'e roll mov journaled for rotation within said side members, :a gear casing mounted on one ofthe said side members, support meansdnterconnecting said gear casing and the other of,

said side members and extending over said rolls, a fir f a s rhaving a gear shaft extending outwardly of said gear I casing and operably connected to the fixed roll shaft, a} second gear disposed in said gear casing andhavinga' gea'r'shaft extending outwardly bf the gear casing an P- erably connected to the movable roll shaft, a drive gear mounted in said gear casing and operably connected to said first and second gears, a drive shaft connected to the drive gear and extending outwardly from the gear casing in the same direction as said gear shafts and in the opposite direction from said support means, a flywheel connected to said drive shaft, and means for driving said drive shaft to thereby rotate said crusher rollls.

3. In a roll crusher, a frame having a pair of spaced side members, a fixed roll having a shaft journaled within said side members, a movable roll movable with respect to the fixed roll and having a shaft journaled within said side members, a gear box mounted on one of said side members, a first gear having a first gear shaft extending outwardly of said gear box and disposed in vertical alignment with the movable roll shaft, a first chain drive means interconnecting said first gear shaft and said movable roll shaft, a second gear disposed in said gear box and having a second gear shaft extending outwardly of the gear box, second chain drive means interconnecting the second gear shaft and said fixed roll shaft, a drive gear mounted in the gear box and operably connected to the said first and second gears, a drive shaft connected to the drive gear and extending outwardly from the gearbox in the same direction as said gear shafts, a flywheel connected to said drive shaft and located adjacent said chain drives, and means for driving said flywheel to thereby drive said drive shaft and thereby rotate said crusher rolls.

4. In a roll crusher, a frame having a pair of side members, a fixed roll having a shaft journaled within said side members, a movable roll movable with respect to the fixed roll and having a shaft journaled within said side members, a gear box mounted on one of said side members, a first gear having a gear shaft extending outwardly of said gear box and connected to the fixed roll shaft, a second gear disposed in said gear box and having a gear shaft extending outwardly of the gear box and connected to the movable roll shaft, a drive gear mounted in the gear box and operably connected to said first and second gears, a drive shaft connected to the drive gear and extending outwardly from the gear box in the same direction as said gear shaft, a flywheel connected to said drive shaft, first journaling means associated with the gear box for journaling said drive shaft, second journaling means disposed adjacent said flywheel and carried by the frame for journaling said drive shaft, and means for driving said flywheel to thereby drive said drive shaft and rotate said crusher rolls.-

5. In a roll crusher, a frame, a pair of rotatable rolls journaled for rotation on said frame and disposed to cooperate with each other to crush a material therebetween, a roll shaft secured to each roll and journaled within the frame, a gear box mounted on the frame, a gear disposed within the gear box, a gear shaft connected to the gear and journaled within the gear box and extending outwardly of said gear box, a fixed hub located outwardly of the gear box and disposed concentrically with the outer portion of the gear shaft and spaced radially outwardly thereof, a collar journaled on said hub, means interconnecting said gear shaft and said collar whereby rotation of the gear shaft rotates said collar on the hub, sprocket means mounted on the collar, chain drive means interconnecting said sprocket and one of said roll shafts,

and drive means for driving said gear to thereby rotate said roll.

6. In a roll crusher, a frame, a pair of rotatable rolls journaled for rotation on said frame and disposed to cooperate with each other to crush a material therebetween, a roll shaft secured to each roll and journaled within the frame, a gear box mounted on the frame and having a pair of spaced side walls, a gear disposed within the gear box, a gear shaft secured to the gear and journaled within the side walls of the gear box, an end of said gear shaft projecting outwardly of the gear box, a hub rigidly secured to the outer surface of one of said side walls and spaced radially outward of the projecting end of said gear shaft, a collar journaled on the hub, means interconnecting the projecting end of said gear shaft and said collar whereby rotation of the gear shaft rotates said collar on the hub, sprocket means mounted on the collar, chain drive means interconnecting said sprocket and one of said roll shafts, and drive means located on the same side of the gear box as said hub and operably connected to the gear for driving said gear to thereby rotate the roll.

7. In a tlOll crusher, a frame, a fixed roll journalled for rotation on said frame, a movable roll journalled for rotation on said frame and mounted for translating movement with respect to the fixed roll, said rolls being disposed to cooperate with each other to crush a material therebetween, a fixed roll shaft secured to said fixed roll, a movable roll shaft connected to said movable roll, a first driven shaft located above and in the same vertical plane with said movable roll shaft, first chain drive means operably connecting said first driven shaft and said movable roll shaft, a second driven shaft, second chain drive means operably connecting said second driven shaft and said fixed troll shaft, said second chain drive means being separate from said first chain drive means, and drive means operably connecting said first and second driven shafts to drive the same and thereby individually drive said fixed and movable rolls.

8. In a roll crusher, a frame, a first roll journalled for rotation on said frame, a second roll journalled for rotation on said frame and mounted for translating movement with respect to the first roll, said rolls being disposed to cooperate with each other for crushing material therebetween, a first roll shaft secured to said first roll, a second roll shaft connected to said second roll, a first driving shaft, first chain drive means operably connecting said first driving shaft and said first roll shaft, a second driving shaft, second chain drive means operably connecting said second driving shaft and said second roll shaft, said second chain drive means being separate from said first chain drive means, a first gear secured to said first driving shaft, a second gear secured to said second driving shaft, and a drive gear engaged With both said first gear and second gear to simultaneously drive both of said driving shafts to thereby rotate the rolls.

References Cited in the file of this patent UNITED STATES PATENTS 667,777 Iler Feb. 12, 1901 1,024,497 Buchanan Apr. 30, 1912 2,366,619 Harrison Jan. 2, 1945 2,579,767 Strawn Dec. 25, 1951 2,879,007 Persyn et al. Mar. 24, 1959 FOREIGN PATENTS 191,668 Great Britain Ian. 18, 1923 

8. IN A ROLL CRUSHER, A FRAME, A FIRST ROLL JOURNALLED FOR ROTATION ON SAID FRAME, A SECOND ROLL JOURNALLED FOR ROTATION ON SAID FRAME AND MOUNTED FOR TRANSLATING MOVEMENT WITH RESPECT TO THE FIRST ROLL, SAID ROLLS BEING DISPOSED TO COOPERATE WITH EACH OTHER FOR CRUSHING MATERIAL THEREBETWEEN, A FIRST ROLL SHAFT SECURED TO SAID FIRST ROLL, A SECOND ROLL SHAFT CONNECTED TO SAID SECOND ROLL, A FIRST DRIVING SHAFT, FIRST CHAIN DRIVE MEANS OPERABLY CONNECTING SAID FIRST DRIVING SHAFT AND SAID FIRST ROLL SHAFT, A SECOND DRIVING SHAFT, SECOND CHAIN DRIVE MEANS OPERABLY CONNECTING SAID SECOND DRIVING SHAFT AND SAID SECOND ROLL SHAFT, SAID SECOND CHAIN DRIVE MEANS BEING SEPARATE FROM SAID FIRST CHAIN DRIVE MEANS, A FIRST GEAR SECURED TO SAID FIRST DRIVING SHAFT, A SECOND GEAR SECURED TO SAID SECOND DRIVING SHAFT, AND A DRIVE GEAR ENGAGED WITH BOTH SAID FIRST GEAR AND SECOND GEAR SIMULTANEOUSLY DRIVE BOTH OF SAID DRIVING SHAFTS TO THEREBY ROTATE THE ROLLS. 